"We have investigated the claims that our network was breached and have found no evidence that there was any intrusion into our network," Sony said in a statement to Joystiq. "Unfortunately, Internet fraud including phishing and password matching are realities that consumers and online networks face on a regular basis. We take these reports very seriously and will continue to monitor our network closely."

As CNET later noted, the leak may have been faked by repurposing customer login details obtained in previous breaches. So, you're probably safe, but it's never a bad idea to change your password anyway.